Just a quick lag test for the Optoma HD23. The Optoma is an entry level 1080p projector, so no special features such as CFI, etc.. This makes the lag testing fairly simple. I put it up against my Planar PX 2710MW 27″ monitor and it was almost on par with it. It ranged from 0ms to 20ms difference, so I would put that at about an average of 10ms difference from my LCD computer monitor. Which means this is a great option for gaming. Here are some pictures of the lag testing, please bear with the cell phone pictures.